基于TD-ERCS混沌系统的图像加密方案  

An Image Encryption Scheme Based on TD-ERCS Chaotic System

作　　者：贾伟尧[1] 潘宇[1] 简远鸣[2] 

机构地区：[1]西南大学物理科学与技术学院,重庆400715 [2]桂林航天工业高等专科学校电子工程系,广西桂林541004

出　　处：《西南师范大学学报（自然科学版）》2012年第3期36-39,共4页Journal of Southwest China Normal University(Natural Science Edition)

基　　金：中央高校基本科研业务费专项资金资助项目(XDJK2009C029)

摘　　要：利用二维的TD-ERCS离散混沌序列生成密钥矩阵,并采用扩展后的希尔密码体制对像素进行改变,分别对灰度图像和彩色图像进行加密算法的Matlab仿真实验.图像加密后的灰度直方图和像素相关性分析表明,加密后的暗文扰乱性好,相关性低,说明该加密方案具有较好的加密效果和较高的安全性.A secret key matrix was generated by 2-dimensional discrete chaotic sequence of the TD-ERCS,and the scheme was improved by Hill cipher to change the pixels of the image.With our encryption algorithm,a grayscale image and a color image were simulated separately by Matlab.Correlation analysis of the grayscale histogram and pixels of the image encryption proved that the dark texts have high perturbative and low relativity,thus indicating that our encryption algorithm is fairly preferable and secure.

关 键 词：混沌 切延迟椭圆反射腔映射系统 图像加密 希尔密码 

分 类 号：O192[理学—数学]